CN-121976605-A - Steel strand self-resetting anti-seismic beam structure and installation method

CN121976605ACN 121976605 ACN121976605 ACN 121976605ACN-121976605-A

Abstract

The invention discloses a steel strand self-resetting anti-seismic beam structure and an installation method, and relates to the technical field of building structure anti-seismic, wherein the steel strand self-resetting anti-seismic beam structure comprises a structural beam body and a structural column body, a connecting table is arranged at the top end of the structural column body, the connecting table is fixedly connected with the structural beam body through a pressurizing assembly, an energy consumption part is arranged at the joint of the structural beam body and the structural column body, a first installation hole and a second installation hole are respectively formed in the side parts of the structural column body and the structural column body, anchor assemblies are arranged in the first installation hole and the second installation hole, and steel strands are connected between the two groups of anchor assemblies. The steel strand self-resetting anti-seismic beam structure and the installation method realize the dual functions of energy consumption and self-resetting after earthquake by the cooperative cooperation of the structural beam body, the steel strand, the energy consumption piece and the anchorage device, ensure that the residual deformation is extremely small, adapt to different types of beam bodies such as cast-in-situ, prefabricated and steel structures, improve the installation efficiency and the construction quality, reduce the construction cost and meet the anti-seismic design requirements of various buildings.

Inventors

DENG FANGZHOU
ZHANG JINGZHOU
LI BINGRU
CHEN HAONAN
MA ZHEHAO
HUANG JIABIN
LI ZHICHENG
Fang Zhuangcheng

Assignees

广州大学

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. The steel strand self-resetting anti-seismic beam structure is characterized by comprising a structural beam body and a structural column body, wherein the top end of the structural column body is provided with a connecting table, the connecting table is fixedly connected with the structural beam body through a pressurizing assembly, and the joint of the structural beam body and the structural column body is provided with an energy consumption part; The structure column body and the lateral part of the structure beam body are respectively provided with a first mounting hole and a second mounting hole, the second mounting holes and the first mounting holes are internally provided with anchoring assemblies, and steel strands are connected between the two groups of anchoring assemblies.
2. The steel strand self-resetting anti-seismic beam structure of claim 1, wherein two sliding grooves are symmetrically formed at one end of a lower flange of the structural beam body.
3. The steel strand self-resetting anti-seismic beam structure of claim 2, wherein a connecting groove is formed in the top of the connecting table, and a lower flange of the structural beam body is arranged in the connecting groove; the bottom of connecting table is provided with the connection edge, the mounting groove has been seted up in the connection edge, the structure cylinder is fixed to be set up in the mounting groove.
4. The steel strand self-resetting anti-seismic beam structure of claim 3, wherein the pressurizing assembly comprises a pressurizing plate arranged above a lower flange of the structural beam body, two ends of the pressurizing plate are respectively provided with a first fixing piece and a second fixing piece, and the second fixing piece passes through the pressurizing plate, the sliding chute and the connecting table to be fixed; the first fixing piece penetrates through the pressurizing plate and the connecting table to be fixed.
5. The steel strand self-resetting vibration-resistant beam structure as set forth in claim 4, wherein the energy dissipation portion comprises a first friction surface and a second friction surface, the second friction surface is a bottom surface of the connecting groove, and the first friction surface is a bottom surface of a lower flange of the structural beam body; and an energy dissipation piece is arranged between the first friction surface and the second friction surface.
6. The steel strand self-resetting anti-seismic beam structure of claim 5, wherein the anchor assembly comprises an anchor, an anchor pad is arranged at one end of the anchor, a clamping piece is arranged in the anchor, and the clamping piece clamps the steel strand.
7. The steel strand self-resetting vibration-resistant beam structure as recited in claim 6, wherein the steel strand is in a relaxed state in an initial state.
8. A method for installing a steel strand self-resetting seismic beam structure according to any one of claims 1-7, comprising the steps of: s1, prefabricating or processing each structural member according to design requirements, and performing corrosion prevention on the steel strand; s2, before site construction, material acceptance, structural member inspection and paying-off positioning are completed; s3, stably hoisting the structural beam body to a designed position, temporarily supporting the structural beam body through a supporting structure, and adjusting the elevation and levelness of the structural beam body to enable the end part of the structural beam body to be aligned with reserved nodes of the structural column body and the wall body, temporarily fastening the structural beam body, and reserving a fine adjustment gap; s4, installing the energy consumption piece, the pressurizing assembly and the anchoring assembly; s5, performing prestress regulation and anchoring; S6, screwing the third fixing piece of the energy consumption piece to the designed pretension, and performing anchor sealing concrete pouring or anti-corrosion treatment on the anchor; S7, comprehensively checking the prestress value, the elongation of the steel strands, the resetting performance of the structural beam body, the node gap and the working state of the energy consumption piece, performing a low-cycle reciprocating loading test, verifying the self-resetting capability and the energy consumption effect of the structural beam body, and entering the next working procedure after the self-resetting capability and the energy consumption effect are qualified.
9. The method for installing a steel strand self-resetting vibration-resistant beam structure as recited in claim 8, wherein S4 comprises: S41, installing an energy consumption piece between the first friction surface and the second friction surface, fixing the energy consumption piece by adopting a fastening piece III, sleeving a connecting table at the upper end of the structural column body with a lower flange wrapping the structural beam body, and adjusting the position to enable the first friction surface to be attached to the second friction surface; S42, installing the first fixing piece and the second fixing piece, and primarily screwing the first fixing piece and the second fixing piece to 50% pretension force to enable the first friction surface and the second friction surface to be tightly attached; S43, installing an anchor assembly, adjusting the position of the anchor, and ensuring the concentricity of the anchor, the hole channel of the first installation hole or the second installation hole and the jack.
10. The method for installing a steel strand self-resetting vibration-resistant beam structure as recited in claim 9, wherein S5 comprises: S51, in an initial state, the steel stranded wires are kept in a loose state, and are fixed at the end parts of the structural beam body and the structural column body only through an anchorage device without applying prestress; S52, when an earthquake occurs and the structural beam body generates large displacement, and the steel stranded wires are naturally tensioned when the earthquake exceeds a preset threshold value, the prestress is exerted, and the beam body is reset; s53, after the earthquake is finished, if residual tensile stress appears in the steel strand, fine tuning and anchoring are carried out through a jack, so that the steel strand is recovered to a loose state; S54, if the steel strand needs to be replaced, tensioning the loose clamping piece through a jack, anchoring again after replacement is completed, and guaranteeing initial state relaxation of the steel strand, fine adjustment is carried out when the steel strand is replaced or reset is abnormal, the clamping piece is jacked for anchoring after fine adjustment is completed in a synchronous mode at two ends, and if redundant steel strands exist, the reserved length is 3-5cm after cutting.

Description

Steel strand self-resetting anti-seismic beam structure and installation method Technical Field The invention relates to the technical field of building structure earthquake resistance, in particular to a steel strand self-resetting earthquake-resistant beam structure and an installation method. Background In the earthquake-resistant design of a building structure, a beam body is used as a core stress member, and the earthquake resistance and the post-earthquake recovery capability directly determine the safety and the subsequent use value of the building structure. The traditional anti-seismic beam adopts rigid connection or common flexible connection, and energy is dissipated by means of plastic deformation of the beam body during earthquake, but the beam body can generate larger residual deformation after Liang Tizhen, is difficult to repair and needs to be removed for reconstruction, so that the maintenance cost is increased, and the normal use of a building can be influenced. In the existing self-resetting prestressed girder technology, the defects are that a part of the structure is reset only by means of prestress, special energy-consuming components are lacked, seismic energy dissipation is insufficient, a girder body or a node is easy to damage, the cooperation of the part of the structure energy-consuming components and a prestress system is unreasonable, reset precision after earthquake is low, residual deformation cannot meet design requirements, meanwhile, the existing installation process is complicated, key processes such as steel strand threading and prestress tensioning lack of normal flow control, problems such as pore canal blocking, tensioning eccentricity and anchor failure are easy to occur, stability of self-resetting and earthquake resistance is affected, in addition, the existing structure is poor in adaptability, installation requirements of different girder bodies such as cast-in-situ, prefabrication and steel structures are difficult to meet, and universality is poor. Aiming at the defects of the prior art, a steel strand self-resetting anti-seismic beam structure and a corresponding installation method which are reasonable in structure, good in anti-seismic energy consumption effect, accurate in post-seismic resetting, convenient to install and high in universality are needed, and the problems of large residual deformation, insufficient energy consumption, complex installation and poor suitability in the prior art are solved. Disclosure of Invention The invention aims to provide a steel strand self-resetting anti-seismic beam structure and an installation method thereof, which solve the problems of large post-earthquake residual deformation, insufficient earthquake energy dissipation, low resetting precision, complicated installation process and poor suitability of the self-resetting anti-seismic beam in the prior art. In order to achieve the above purpose, the invention provides a steel strand self-resetting anti-seismic beam structure, which comprises a structural beam body and a structural column body, wherein the top end of the structural column body is provided with a connecting table, the connecting table is fixedly connected with the structural beam body through a pressurizing assembly, and the joint of the structural beam body and the structural column body is provided with an energy consumption part; The structure column body and the lateral part of the structure beam body are respectively provided with a first mounting hole and a second mounting hole, the second mounting holes and the first mounting holes are internally provided with anchoring assemblies, and steel strands are connected between the two groups of anchoring assemblies. Preferably, two sliding grooves are symmetrically formed at one end of the lower flange of the structural beam body. Preferably, a connecting groove is formed in the top of the connecting table, and the lower flange of the structural beam body is arranged in the connecting groove; the bottom of connecting table is provided with the connection edge, the mounting groove has been seted up in the connection edge, the structure cylinder is fixed to be set up in the mounting groove. Preferably, the pressurizing assembly comprises a pressurizing plate arranged above the lower flange of the structural beam body, wherein a first fixing piece and a second fixing piece are respectively arranged at two ends of the pressurizing plate, and the second fixing piece penetrates through the pressurizing plate, the sliding chute and the connecting table to be fixed; the first fixing piece penetrates through the pressurizing plate and the connecting table to be fixed. Preferably, the energy dissipation part comprises a first friction surface and a second friction surface, the second friction surface is the bottom surface of the connecting groove, and the first friction surface is the bottom surface of the lower flange of the structural beam body; and an energy